Nomenclature Worksheet
I.
Binary Compounds
A binary compound is one containing only two elements
1. The more metallic element is named first, followed by the more non-metallic
element.
2. The name of the non-metallic element carries the suffix ide.
i. Examples: CaO = calcium oxide CaCl2 = calcium chloride
ii. CaS = calcium
sulfide
CaH2 = calcium hydride
3. The ammonium ion, NH4+; the hydroxide ion, OH-; and the cyanide ion, CN-; are
treated as single elements.
NH4OH = ammonium hydroxide
NaCN = sodium cyanide
4. If the metallic element is capable of more than one valence the roman numeral
distinguishes which ion is used.
FeCl3 = iron (III) chloride
CuO = copper (II) oxide,
FeCl2 = iron (III)chloride,
Cu2O = copper(I)oxide
Name the following ionic compounds- use your text or ion chart as needed.
1. CaO
_________________________
13. CaCl2____________________________
2. NaCl
_________________________
14. Cu2S ____________________________
3. NaCN _________________________
15. KH ____________________________
4. SbBr3 __________________________
16. NH4CN _________________________
5. PbO __________________________
17. Hg2F2 __________________________
6. MgS __________________________
18. HgO ___________________________
7. NH4Br _________________________
19. FeCl2 ___________________________
8. AgCN __________________________
20. Ag2O ___________________________
9. MnBr2__________________________
21. AlBr3 ___________________________
10. CuO ___________________________
22. Fe(OH)3 _________________________
11. ZnI2 ___________________________
23. Ba(OH)2_________________________
12. K3N ___________________________
24. PbBr2 ___________________________
Covalent Compounds
When naming compounds of a given pair of elements exist, they are best named by using the
prefixes mono, di, tri, tetra, penta, hexa, hepta, and octa to indicate the number of atoms
involved. The prefix mono is usually omitted.
N2O = dinitrogen monoxide or dinitrogen oxide
NO = nitrogen oxide
N2O3 = dinitrogen trioxide, often called nitrogen trioxide
NO2 = nitrogen dioxide
N2O4 = dinitrogen tetraoxide, ofen called nitrogen tetraoxide
N2O5 = dinitrogen pentoxide, often called nitrogen pentoxide
Name the following compounds:
25. CCI4____________________________ 39. ICl3 ________________________
26. PCl5 ___________________________
40. H2S3 ________________________
27. SI6 ____________________________
41. N2O3 ___________________________________
28. I2O4___________________________
42. I2O9 ________________________
29. BrO2__________________________
43. SO3 _________________________
30. N2F4 _________________________
44. NI3 __________________________
31. N2O4___________________________
45. Br2O_________________________
32. P3N5 __________________________
46. BN2__________________________
33. SF6___________________________
47. CS2__________________________
34. CO __________________________
48. F2O_____________________________________
35. NF3 __________________________
49. P4S7_________________________
36. SiO2__________________________
50. CO2 _________________________
37. CBr4 _________________________
51. IF7 __________________________
38. SO2 __________________________
52. P2O5 _________________________
Formula Writing Practice Worksheet #2
Name:
Correct the following formula, if necessary, and name the compounds.
Correct formula
Name of compound
1. Cd(CN)
__________________
_________________________
2. BN
__________________
_________________________
3. Ca(OH)
__________________
_________________________
4. RaCl
__________________
_________________________
5. AgS
__________________
_________________________
6. AlO
__________________
_________________________
7. KS
__________________
_________________________
8. CuBr
__________________
_________________________
9. Zn(OH)
__________________
_________________________
10. (NH4)S
__________________
_________________________
11. Mg3N2
__________________
_________________________
12. NaH
__________________
_________________________
13. Ba(CN)
__________________
_________________________
14. AgO
__________________
_________________________
15. SnBr2
__________________
_________________________
16. CuF2
__________________
_________________________
17. SnCl
__________________
_________________________
18. AlBr
__________________
_________________________
19. Cu2O
__________________
_________________________
20. FeCl
__________________
_________________________
21. Ba(OH)
__________________
_________________________
22. Al(OH)3
__________________
_________________________
23. (NH4)(OH)
__________________
24. AlN
____________________
_________________________
_________________________
25. SnO2
______________________
_________________________
26. RaO
_____________________
_________________________
27. SiCl
______________________
_________________________
28. Zn(C2H3O2)_____________________
_________________________
29. MgI
______________________
_________________________
30. CuO
______________________
_________________________
31. BH
______________________
_________________________
32. ZnCl
______________________
_________________________
33. BeCl
______________________
_________________________
34. CCl4
______________________
_________________________
35. N2O
______________________
_________________________
36. PtBr
_____________________
_________________________
37. NBr _______________________
_________________________
38. GeBr4 _______________________
_________________________
39. K2(CO3) ______________________
_________________________
40. AsO _______________________
_________________________
41. P2O5 ________________________
_________________________
42. NaS
_______________________
_________________________
43. KN
________________________
_________________________
44. SI6
______________________
_________________________
45. Hg2O3
______________________
_________________________
46. ScO5
____________________
_________________________
47. (NH4)(CN)_____________________
_________________________
48. MgC
_______________________
_________________________
49. BC
_______________________
_________________________
50. SiN
_______________________
___________________________
II.
Acid Nomenclature
A. Binary acids may be named as binary compounds or by the following rules:
1. Use either the stem or the full name of the nonmetallic element
2. Add the prefix hydro.
3. Add the suffix ic.
H2S = Hydrosulfuric acid
HCl = Hydrocholoric acid
Name the following acids:
1. HBr _____________________________
___________________________
3. H2Se
2. HI ______________________________
___________________________
4. H2Te
B. Ternary acids are composed of three elements: hydrogen, a nonmetal, and
oxygen
1. The most common acid formed by these three elements is named by
adding the suffix ic to the stem of the non-metal.
H2SO4 = Sulfuric acid
H2SeO4 = Selenic acid
HClO3 = Chloric acid
HBrO3 = Bromic acid
HNO3 = Nitric acid
H3PO4 = Phosphoric acid
2. The acid containing one less oxygen atom than the ic acid is named by
adding the suffix ous to the stem of the non-metal.
HClO2 = Chlorous acid
3. The acid containing one less oxygen atom than the ous acid (or two less
oxygen atoms than the ic acid) is named by adding the prefix hypo and
the suffix ous to the stem.
HClO = Hypochlorous acid
4. The acid containing one more oxygen atom than the ic acid is named by
adding the prefix per and the suffix ic to the stem.
HClO4 = Perchloric acid
Supply the Missing Name or Formula for the acids listed below
1._____________________Hydrofluoric acid
20. HNO3 ___________________________
2. HIO3___________________________
21. H3PO3__________________________
3. H2Se___________________________
22. HBrO __________________________
4. HNO2__________________________
23. HClO __________________________
5. H2Te___________________________
24. H2SeO4_________________________
6. HI ____________________________
25. ___________________Arsenous acid
7. H3AsO2________________________
26. HBrO3 ________________________________________
8. H2SeO3_________________________
27. H2SO3 __________________________
9. HAtO3__________________________
28. ______________________Bromic acid
10. ______________________Carbonic acid
29. HCl_____________________________
11. HAtO_________________________
30. HMnO4_________________________
12. H3AsO4________________________
acid
31. ___________________Hypochlorous
13. H3PO4_________________________
32. _____________________Selenic acid
14. _____________________Hydrochloric acid
33. HBr ________________________
15. H3AsO3________________________
34. H2S__________________________
16. H2CO3_________________________
35. HIO _________________________
17. H2SO4__________________________
36. ____________________Nitrous acid
18. H3PO2__________________________
37. HF _____________________________
19. HClO4__________________________
38. _________________Hydrosulfuric acid
III.
Bases
Bases are named as binary compounds with the hydroxide ion as the nonmetal.
IV.
Salts
A. Salts of binary acids are named as binary compounds.
B. Salts of ternary acids are named as binary compounds except that the place
of the non-metal is taken by the name of the acid radical, derived as
follows:
1. Salts derived from ic acids – substitute the suffix ate.
Chloric acid HClO3
 Sodium chlorate
NaClO3
2. Salts derived from ous acids – substitute the suffix ite.
Chlorous aicd HClO2  Sodium chlorite NaClO2
3. Salts derived from hypo…ous acids – retain the prefix hypo but
substitute the suffix ite.
Hypochlorous acid HClO  Sodium hypochlorite NaClO
4. Salts derived from per…ic acids – retain the prefix per but substitute the
suffix ate.
Perchloric acid HClO4  Sodium perchlorate NaClO4
Complete the following table
Formula of acid
Name of acid
Formula of
Name of
potassium salt
potassium salt
1. H2SO4 ____________________ ____________________ __________________
2. HClO ____________________ ____________________________________
3. H3PO4 ____________________ ______________________________________
4. H2CO3 ____________________ _______________________________________
5. HClO4 _________________________________________________________
6. H3AsO4___________________ _______________________________________
7. HCl
___________________ _______________________________________
8. HNO3 ___________________ _______________________________________
9. H2BrO3___________________ _______________________________________
10.HBrO3 ___________________ _______________________________________
Formula of
Name of acid
Acid
Formula of
Name of
Barium Salt
Barium Salt
11._________
Selenic acid
_________
_______________
12._________
Chlorous acid
_________
_______________
13._________
Hydrobromic acid
_________
_______________
14._________
Nitric acid
_________
_______________
15. _________
Phosphorous acid
_________
_______________
16. _________
Carbonic acid
_________
_______________
Formula of
Name of acid
Formula of
Name of
Aluminum salt
Aluminum salt
Acid
17._________
________________
__________
Aluminum nitrite
18._________
________________
__________
Aluminum sulfite
19. _________
________________
__________
Aluminum arsenate
20. _________
________________
__________ Aluminum hypochlorite
21._________
________________
___________ Aluminum phosphate
22._________
________________
___________ Aluminum chlorate
Formula
Name of Salt
Of Salt
23._________
________________
MgSO4
___________________
24. _________
________________
Cd(BrO3)
___________________
25. _________
________________
Cs2SO4
___________________
26. _________
________________
Fe(NO3)2
___________________
27. _________
________________
Ag3PO4
____________________
28. _________
________________
CuS
____________________
29. _________
________________
NH4Br
____________________
30. _________
________________
BaCO3
____________________
31. _________
________________
Fe2(SeO4)3 ____________________
32. _________
________________
SbCl3
____________________
Formula of Acid Name of Acid
Formula of Salt
Name of Salt
33.________
_________________
BaSeO4
_______________
34.________
_________________
MgCr2O7
_______________
35. ________
_________________
ZnS
_______________
36. ________
_________________
NaMnO4
_______________
37. ________
_________________
MgSO3
_______________
38. ________
_________________
ZnCO3
_______________
39. ________
_________________
LiClO4
_______________
40. ________
_________________
Be3(PO4)2
_______________
41. ________
_________________
CuSeO3
_______________
42. ________
_________________
Cd(ClO3)2
_______________
43. ________
_________________
AgC2H3O2
_______________
44. ________
_________________
KNO3
_______________
45. ________
_________________
SrCl2
_______________
46. ________
_________________
LiClO4
_______________
47. ________
_________________
Al(ClO)3
_______________
48. ________
_________________
SrSO3
_______________
49. ________
_________________
____________
Silver bromate
50. ________
_________________
____________
Copper(I) sulfide
51. ________
_________________
____________ Ammonium sulfate
52. ________
_________________
____________ Aluminum arsenite
53. ________
_________________
_____________ Iron (II) carbonate
54. ________
_________________
_____________ Sodium dichromate
55. ________
_________________
_____________ Cadmium phosphate
56. ________
_________________
_____________ Cesium bromide
57. ________
_________________
_____________
58. ________
_________________
__________Potassium permanganate
59. ________
_________________
__________
Iron (III) chloride
60. _______
________________
___________
Barium selenate
Zinc chlorite
C. Other Salts
1. Acid Salts – Salts from which all the replaceable hydrogen ions of the
acid have not been removed.
NaH2PO4
=
Sodium dihydrogen phosphate
Na2HPO4
=
Sodium hydrogen phosphate
NaHCO3
=
Sodium hydrogen carbonate (sodium bicarbonate)
2. Basic Salts- Salts from which all the replaceable hydroxyl radicals of the
base have not been removed.
Al(OH)Br2
Al(OH)2Br
=
=
Hydroxoaluminum dibromide
Dihydroxoaluminum bromide
3. Double Salts - Salts containing two different metallic elements or acid
radicals.
KAl(SO4)2
=
MgNH4PO4 =
Potassium aluminum sulfate
Magnesium ammonium phosphate
Name the following Salts:
1. KHSO4
___________________________________
2. CaHAsO4
___________________________________
3. NaHSO3
___________________________________
4. LiHSO3
___________________________________
5. NaHCO3
___________________________________
6. Na2HAsO3
___________________________________
7. CdHPO3
___________________________________
8. KHCO3
___________________________________
9. NaHSeO4
___________________________________
10. Al(HSO4)3 ___________________________________
11. NH4H2PO4 ___________________________________